(sighs) geico. fifteen minutes could save you...well, you know. you may expect to pay higher gas prices during a holiday weekend. but pamela brown reports fuel prices are actually going down. >>mark: >>whether you drive a gas guzzler or not, it's a good bet you're paying extra attention to prices at the pump if you're on the road, this holiday weekend. "you never know what's going to happen. it goes up and down all the time" good news. right now, they're going down. the national average for a gallon of gas is just below three-50 a gallon, "it's often a myth that gas prices rise when it's coming to a major holiday. it turns out that it's really not the case. in fact, this year, gas prices have dropped for 20 days in a row." the reason? gas supply is up while consumer demand is down. "one, the economy remains quite weak; two, people are driving more efficient cars; and three, people really just aren't driving as much as they used to." still, triple-a says this year's prices are the third-highest on record, right behind 3-57 a gallon in 2011 and a lo